solid_rrect_blur_contents.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_IMPELLER_ENTITY_CONTENTS_SOLID_RRECT_BLUR_CONTENTS_H_
#define FLUTTER_IMPELLER_ENTITY_CONTENTS_SOLID_RRECT_BLUR_CONTENTS_H_
 
#include <functional>
#include <memory>
#include <vector>
 
#include "impeller/entity/contents/contents.h"
#include "impeller/entity/contents/filters/filter_contents.h"
#include "impeller/geometry/color.h"
 
namespace impeller {
 
class Path;
class HostBuffer;
struct VertexBuffer;
 
/// @brief  Draws a fast solid color blur of an rounded rectangle. Only supports
/// RRects with fully symmetrical radii. Also produces correct results for
/// rectangles (corner_radius=0) and circles (corner_radius=width/2=height/2).
class SolidRRectBlurContents final : public Contents {
 public:
  SolidRRectBlurContents();
 
  ~SolidRRectBlurContents() override;
 
  void SetRRect(std::optional<Rect> rect, Size corner_radii = {});
 
  void SetSigma(Sigma sigma);
 
  void SetColor(Color color);
 
  Color GetColor() const;
 
  // |Contents|
  std::optional<Rect> GetCoverage(const Entity& entity) const override;
 
  // |Contents|
  bool Render(const ContentContext& renderer,
              const Entity& entity,
              RenderPass& pass) const override;
 
  // |Contents|
  [[nodiscard]] bool ApplyColorFilter(
      const ColorFilterProc& color_filter_proc) override;
 
 private:
  std::optional<Rect> rect_;
  Size corner_radii_;
  Sigma sigma_;
 
  Color color_;
 
  SolidRRectBlurContents(const SolidRRectBlurContents&) = delete;
 
  SolidRRectBlurContents& operator=(const SolidRRectBlurContents&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_SOLID_RRECT_BLUR_CONTENTS_H_